【摘要】 目的观察Bionator矫治器对口呼吸儿童上气道周围结构的影响,寻求有效的治疗手段。方法对20例替牙期伴口呼吸的安Ⅱ类1分类错合患者,以Bionator矫治器治疗,于治疗前、后拍摄头颅侧定位片,对其中的上气道周围结构的形态学变化值作对比分析,并进行统计学检验。结果患者鼻咽部的骨性鼻咽(PNS-Ba)和软腭至软腭后咽壁距(SPP-SPPW)与治疗前比较增大了2.37mm和2.46mm。悬雍垂尖-中咽壁距(U-MPW)、舌咽部最小距离(P-T)和后气道间隙(TB-TPPW)与治疗前相比较都有明显增加,其变化有统计学意义。软腭与舌接触长度(UC-LC)、舌体长(V-T)和舌体高(TD-VT)也分别较治疗前明显增加。而软腭至腭平面角(PNS-U/PP)则较治疗前减小(P<0.05);舌骨至下颌平面(H-MP)、眼耳平面(H-FH)和蝶鞍的垂直距离(H-Sver)等测量值减少。而舌骨相对于第三颈椎的水平距(H-C3hor)明显增加,其变化有显著性差异。结论Bionator矫治器通过下颌骨的向前移位和对舌肌的训练,能改变舌低位,并能使舌骨向前向上移位,咽部矢状径扩大,有利于口呼吸方式向鼻呼吸方式的转变。更多还原

【Abstract】 Objective To study the effects of Bionator appliance on vicinal structure of upper airway in mouth breathing children, and find effective treatment. Methods 20 patients of mixed-dentition with AnglesⅡ1malocclusion of topical mouth breathing were treated by Bionato appliance, and the vicinal structure of upper airway changes of pretreatment and post-treatment were measured and analysised. Results The values of PNS-Ba and SPP-SPPW were bigger than that of pretreatment by 2.37mm and 2.46mm.The U-MPW,P-T and TB-TPPW were increased. The UC-LC, V-T and TD-VT were bigger than that of pretreatment and PNS-U/PP was small. In vertical direction,H-FH and H-Sver were decreased,but the H-C3hor was increased. There were statistic differences between pretreatment and post-treatment. Conclusion The Bionator appliance can gradually shift the tongue and hyoid foreward and upward. It can improve the sagittal dimensions of upper airway in mouth breathing children, when it changes the relations between maxilla and mandible. It is advantageous to transfer the mouth breathing to nose breathing.更多还原